Pierre Barbier (born 25 September 1997) is a French professional road cyclist, who currently rides for UCI Continental Team . He is the younger brother of the cyclist Rudy Barbier. Major results 20
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2064de60faa8998a7cc0dea895b8c5202647c6305b41a6ef731f90004a3b423. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b26624e-9d6c-4f7b-a17a-7a82844414c9.json and https://artists.proofprofile.net/proofs/artist/5b26624e-9d6c-4f7b-a17a-7a82844414c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Offenbach: Les contes d'Hoffmann, Act 2: Barcarolle, "Schöne Nacht, du Liebesnacht" (Niklausse, Giulietta, Chorus)
Offenbach: Hoffmanns Erzählungen (Großer Querschnitt in deutscher Sprache)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e6ad2ae46d5641c41b024f87bc91eab663e2a6151aea8c5f69313197217135. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA341300289.
Hoffmanns Erzählungen - Oper in drei Akten, einem Vor- und einem Nachspiel (Gesamtaufnahme in deutscher Sprache), Vorspiel: Nr. 1 Chor: Aus dem Keller kommt hervor
Chor des Bayerischen Rundfunks/Münchner Rundfunkorchester/Heinz Wallberg
Offenbach: Hoffmanns Erzählungen [Sung in German]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d48e677d006c452756f140549500578131aaba49bdaa138aec360035e8ac50. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA341300007.
Hoffmanns Erzählungen - Oper in drei Akten, einem Vor- und einem Nachspiel (Gesamtaufnahme in deutscher Sprache), Vorspiel: Nr. 1a Szene: He! Du da! Auf ein Wort, mein Sohn
Friedrich Lenz /Dietrich Fischer-Dieskau/Münchner Rundfunkorchester/Heinz Wallberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db96b69e2eb0d783905ad07ef55c38fe457d6f28b52e4809f2485625b3c39d. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA341300008.
Hoffmanns Erzählungen - Oper in drei Akten, einem Vor- und einem Nachspiel (Gesamtaufnahme in deutscher Sprache), Vorspiel: Nr. 2 Lied: Kann nicht schmachten und jugendlich girren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1eadfb2236c3cee426851d9f0c5e63f70cf67fb63a70e82826dda588f86659. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA341300009.
Hoffmanns Erzählungen - Oper in drei Akten, einem Vor- und einem Nachspiel (Gesamtaufnahme in deutscher Sprache), Vorspiel: Nr. 3 Szene: Zwei Stunden noch vor mir - Hurtig! Schnelle!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb839b07a26872a78c2221b81027dab1456d6941c8fbb0c0e45d9a196caabb041. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA341300010.